I'm sure he'll stick to everything RJ specifically noted, though lets keep in mind that from a realistic point of view RJ probably hadn't flushed everything out and might easily have left vague or even contradictory notes on stuff that represented his own brainstorming, I'm sure RJ wrote many a scene then later changed them because he didn't like it when it was done, most writers do that. Ironically BS is likely to be truer to RJ's notes than RJ himself would have been had he written AMOL himself, since if something in those notes just doesn't flow write with the story RJ could have scrapped it whereas BS is likely to try to make it work.